Stop for weights of multiple-needle detectors



1,633,637 June 28, 1927. E' R. HOLMES STOP FOR WE'IGHTS OF MULTIPLE NEEDLE) DETECTORS Filed Deo. 21. 1925 Patented June 28, 1927.

UiTE'D STATES j 1,633,637 PATENT orties.

ELBRIDGE R. HOLMES, OF WORCESTER MASSACHUSETTS, ASSIGNOR TO CROMITON & KNOWLES LOO'M WORKS, OF VORCESTER, MASSACHUSETTS, A CORPORATION OF lVIASSACHU SETTS.

STOP FOR WEIGHTS OF MULTIPLE-NEEDLE DETECTORS.

Application led December 21, 1925.

needle so that the saine will penetrate a very thin layer of yarn, thus rendering unnecessary the winding of a bunch on the bobbin. Detectors of this type when applied to the usual ystyle of vautomatic box leoni are so .located that the weights swing upwardly and strike the hub of the ti'ansfeirer lever and it is found that due to this action the weights are deformed to such an extent that they do not work with proper freedom. It is an iinportant I,object of iiiy invention to provide a 4stop for the weights which shall be yieldable to the endy that said weights will not be deformed and in carryingy out this feature of iny linvention I en'iploy the arni already provided on detectors of this type for withdrawing the detector needles.

on the transferring beat of the looiii.

If the looin is running at a relatively hieh rate of speed it is found that the blow of t ie yarn against the rear ends ofthe detector needles swings the weights away from the needles and as the weights rebound they strike the needles a blow which tends to push said needles through the yarn and into one `of the holesforined in the wooden portion of the barrel. The needles are lornied ol wires which have two parallel arnisthe upper of which cooperates with a so-called actuator lever having a downward niotiou when the lay is substantially in its.

extreme forward position and if the blow struck the needles by the weights cornes too late to penetrate the yarn then the upper :iriu of the needles will be driven against the artuator hner to score the latter and in time it is found that the lever and the .needles do not cooperate as theyY should. lt is a further object of iny invention to place the stop for the weights in such position thatexcess movement of the weights is prevented, thus avoiding the blow given the needles Serial No. 76,822.

and` preventing the aforesaid undesirable results.

It is a fnitherand nioi'e particular object of 'niy invention to place the stop for the weights on the carrier which supports said weights and wires rto the end that said stop will be iii proper relation with respect to the weights in all adjusted positionsI of the deteetor.

l/Vitli these and other objects in view which will appear as the description pi'oeeedsiny invention resides iii the combination and ar` rangement of parts hereinafter' described and set forth in the claims.

In the accompanying drawings wherein I have shown a convenient eiiibodinient of iiiy invention,

Fig. 1 is a side elevation of a detector einbodyiiig iiiy invention, certain parts being shown in section,

Fig. 2 is a top plan view taken in the direction of arrow 2, Fig. 1, and Fig. 3 is a perspective view of the inounting for the stop.

Referring to the drawings it will be seen that I have provided a stand l() secured in any approved nianner to fixed structure such as a loon'i side and I provide said stand with slots one of which is indicated at 11 in Fig. 1. A support 12 is held to the stand by n/ieans of bolts 13 one of which is indicated in Fig. l and the slots 1l permit vertical` adjustment of the support with respect to the stand. l A needle carrier 14- is provided with a notch 15 which receives a tongue or rib 1( extending horizontally on the upper end of .the support l2, A bracket 17 .formed preferably of sheet inetal is reeured by means of screws 18 to the forward lower face of the carrier 14' and has upper and lower arnis t9 and nhl. respectively. "he lower ariii of the bracket has secured thereto .the forward end of a tension spring` Q1 the rear end of which extends through the lower endof carrier 14 and the ulfper'end of snport l2 and is held in position b v nieans of a pin Q2 held against the rear fare of the support l2 b v the tension of the spring. In this way the carrier may inove angularly with respect to the support 1:2 and niay also move forwardly should a bobbin be raiuht between the rear end of the carrier and 'the advancing lay.

Mounted for free sliding niotion in said (ttl tit)

carrier is a plurality of needles 23 each having a lower yarn engaging arm 24 and an upper indicating end 25 positioned for cooperation with an actuator lever 26. Said needles cooperate with the bobbin IV the barrel of which is provided with a plurality of spirally arranged openings as set forth in Patent No. 1,220,685. When a suflicient snpply of wett present all the needles will be moved forwardly so that actuator level' 26 may move downwardly but. when insutiicient weft for continued waving is present one or another of the needles will enter an opening in the bobbin and the, indicatingr arm 25 corresponding thereto will arrestr downward motion of the, actuator lever to give an indication of weft exhaustion.

Said carrier Il supports a stud 2 on which is mounted for tree pivotal mo ion a withdrawing arm 28 illustrated in Fig. il. said arm 28 hai ing spaced bearing through which the stud 2T passes and ou which said arm pivots` and hangingr as shown in t'ull lines in Fig. l by gravity. withdrawing linger 29 extends behind ther upright portions il() olE the needles and operates to withdraw the needles 2? out of the path olI the indicating bobbin at the time. oll transfer, this motion being accomplished by engagement oll some part of the traust'errer arm (not shown) with the laterally extending wing Il. Itlxeess l'orward movement ol1 the needles is prevented by the upbent end 3&2 ol' the upper arm 19 of the steel bracket IT. Also mounted on said stud 2T is a plurality ot weights "l .i3 each havinga rearwardly extending portion 34, to engage the upright part of a needle to hold it vieldingly in rearward position. The mattei` thus far described is substantially the same as the strncture forth in the aforesaid fro-pending application and also in Patent No. 1,549,960.

As previously stated it is found that as the, weft advances with the lay it engages the needles and the weights 33 are found to have an undesirable motion about the pivot 27 resulting in deforming said weights and also rebounding of the same to cause improper action of the needles either on the weft supply or on the forward face of the actuator lever 26. In carrying out my improvements I form the withdrawing arm 28 with a pair of forwardly extending arms 40 between which extends a stop rod stl freely rotatable in the arms and preferably though not necessarily formed ot a slightly resilient material such as rawhide. Said stop rod 41 is so placed that when a full bobbin is in eXtreme forward position the weights 33 when in engagement with the needle detectors will be immediately below the rod 4l. Should said weights tend to move beyond their proper position they will engage the rod 4l and lift the withdrawing arm from the full line position to the dot and dash line position indicated in Fig. 1 against gravity. In this way the weights are restrained in a manner which will not deform them and the weights are also held against movement to an elevated position from which they could Yli'all and strike the needles to give the latter the undesirable moveiue z .neviously dem-ribeil. (.lbviously. any vertical or horizontal adjustment of the detector can be made without disturbing the proper position ot' the stop rod 4l with respect to the weiUhls.

From the foregoing it will be .seen that l have in'ovided a yieldable stop for the weights ot' multiple needle weft detectors. said slop being capable of slight motion to prevent defun-ming o' the weights and also being so loeiited as to resist excess movement to pre\eut rebounding of said weights and being mounted on the usual withdrawing arm ol' such detectors. It will also be seen that the stop moves with the detector when the latter is adjusted so as to preserve the proper relation between said stop and the weights.

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled iu the art without departing trom the spirit and scope of the invention, and I do not wish to be limited to the details herein diselosed but what I claim is:

l. lu a wett detector having a plurality ot yarn engaging deteetor needles and weights l'or said needles to hold said needles yieldiugly against the yarn, a stop yieldingly mounted and positioned to engage the weights to restrain excess movement thereof.

2. In a weft detector having a plurality of yarn engaging detector needles and Weights 'ter said needles to hold said needles yieldingly against the yarn, in combination, a pivotally mounted arm movable against gravity to withdraw the detector needles, and a stop mounted on said arm and movable therewith against the action of gravity when engaged by the weights to restrict excess movement of the latter.

3. In a weft detector having a plurality of yarn engaging detector needles and weights for said needles to hold said needles yieldingly against the yarn, in combination, a carrier for the detector needles, an arm vieldingly mounted on the carrier, and a stop mounted on and movable with the arm to engage and yieldingly resist excess movement of the weights.

4. In a weft detector having a plurality of varn engaging detector needles and weights for said needles to hold said needles yieldingly against the yarn, means to revent excess movcment of said weights eyond the position corresponding to the position occupied by the needles when the latter are in their foremost position.

5. In a weft detector for looms, a stand, a plurality of needle detectors adjustably supported with respect to the stand, a plurality ot' weights one tor each needle detector movingl with the needles when the latter are adjusted with respect to the stand, and :1 stop for the weights to restrict excess movement thereof, said stop also being movable with the needles and the weights when said needles and weights are adjusted as to position with respect to the stand.

G. ln a wett detector for looms, a stand, a support adjustably mounted on the stand, a plurality of needle detectors, a carrier for said detectors adjustably mounted on the support, a plurality of weights one for each needle detector mounted for free pivotal motion with respect to the carrier, and a stop supported by the needle carrier and positioned to prevent excess movement of said weights beyond the position corresponding` to the foremost position of the needles when the lutter are moved forwardly by engagement with the supply of yarn.

7. A detector withdrawing and weight restraining member for a weft detector having a plurality ot' needle detectors and a Weight for each detector movable freely about a pivot, said member having bearing portions for the pivot of the weights, and having portions to engage the detectors to Withdraw the same, and said member also being provided with a stop to restrain excess movement of the weights.

In testimony whereof I have hereunto atlixed my signature.

ELBRIDGE R. HOLMES. 

